Thill-coupling



(No Model. V

D. MURRAY. THILL GOUPL'ING.

Patented Peb. 14, i888.

UNITED STATES PATENT OFFICE.

DANIEL MUEEAY, oE SALEM, MASSACHUSETTS.

THlLL-COUPLING.

SPECIFICATION forming part of Letters Patent No. 377,861I dated February14,1888.

Application filed October 19, 1887. Serial No. 252,847. (No modeh) lcompanying drawings, is a specification.

This invention relates to improvements .in thill-couplings, and it iscarried out as follows,

lreference being had to the accompanying drawings, whereinj Figure 1represents a plan view of the invention. Fig. 2 represents alongitudinalsection on the line A B, shown in Fig. l. Fig. 3 represents across-section on the line C D, also shown in Fig. l; and Fig. 4.represents a plan view of the shaft-iron.

Similar letters referto similar parts wherever they occur on thedifferent parts of the drawings.

.a is the clasp, with its screws a a and nuts a a", by means of whichand the yoke b said clasp is firmly secured to the carriage-axle c, asusual.

In one piece with the clasp a is made the bearing-piece a3, having anupwardly-project-V ing annular shell, a, made in one piece with orsecured to said bearingpiece as, as shown in Figs. 2 and 3.

d is the shaft-iron, secured by means of bolts r screws to the shaft, asusual. Said shaftiron has a rear forked end, d', and in one piece withsuch forked end are made the trunnions d d and central ball, d3, asshownin the drawings. The annular shell a4 is cutaway from the topdownward at two diametrically-opposite places, as shown at a5 a5 in Fig.3, as well as in dotted lines in Fig. 2, to permit the trunnions d d tobe introduced therein when the ball da is placed within the said shella4, as shown in Figs. 2 and 3. The interior upper portion of the shellor.4 is screw-threaded, and into it is screwed firmly the plug e, thelower end of which is cup-shaped, as shown at e in Figs. 2

. and 3, corresponding to the ball d3, forwhich it serves as an upperbearing.

fis a detachable ring that is placed around the shell a* `after the balld3 has been placed within the shell a, 'and it serves to cover up theslits or openings a5 a5 in the sides of the shell a4, thus preventingdust or grit from getting into the Shell a4, as well as serving toretain the lubricant that is/placed in said shell. After the said ring fhas been placed in posi"- tion, as shown in Figs. 2 and 3, the plug e isscrewed iu place, as shown in said figures, its flange e" serving tohold the ring f in place. The under side of the ball da has its bearingin the cup g, which latter has a downwardly-projecting screw threadedshank, g', that is adjustable in a screw-threaded perforation in thebottom of ,the bearing -piece a, as shown in Figs. 2 and 3, said shankbeing preferably provided with a slit,'g, in its lower end, to enable itto be turned and adjusted 'by means of an ordinary screw-driver orequivalent tool.

g3 is a check nut on the lower end of the shank g', for the purpose ofsecuring the latter to the bearing-piece a3 after it has been adjusted.It will thus be seen that in the ratio as the ball d3 wears such wear iscompensated by the vertical adjustment .ofl the cup-bearing g, thuspermitting the ball of the shaft-iron to work freely in its twocup-bearings without any rattling whatever.

Having thus fully described the nature, construction, and operation ofmy invention, I

wish to secure by Letters Patent and claiml. In athill coupling, theclasp a and its bearing a", having the shell on4 andfcup-Shaped plug ee', in combination with the shaft-iron d, having forked end d',trunnions d d, and ball d3, and the adjustable cup-bearingg, hav-ingscrew-threaded shank -g-'-and check-nut g3, as and for the purpose setforth.

2. In a thill-coupling, the bearing-piece a3 V I and its shell a4 andthe shaftiron d, withits forked end d', trunnions d di', and bal'Ld3, incombination withthe cup-shapedv upper plug, e e', the inclosing ringf,and lower adjustable cup-bearing, g, having screw-threaded shank g andcheck-nut g3, as and for the purpose set forth.v

In testimony whereof I have signed my name to this specification, in thepresence of two sub scribing witnesses, on this 10th day of August,

- DANIEL MURRAY.

Witnesses:

-ALEAN ANDREN,

HELEN S. ANDRFSN.

